Portable hoisting device.



I K/K W.

G. W. MURRAY 6: G. V. RIGHBY.

PORTABLEHOISTING DEVICE. I

APPLICATION IILBD OUT. 5, 1906. RENEWED OOT. 21, 1907.

I amvemtow' vi/bmeooeo M] K4 0 grid-2% -W .4... L2} 1 PATENTED MAY 12,1908.

UNITED srriia ns PATENT OFFICE.

GEORGE W. MURRAY, OF SUMTlfllt, SOUTH (1A ROLINA, AND CHARLES V. RICHEY,OF WASHINGTON, DISTltIC/l OF COLUMBIA.

PORTABLE HOIS'IING DEVICE Specification of Letters Patent.

Patented May 12, 1908.

Application filed October 5, 1905, Serial No. 281,502. Renewed October21, 1907. Serial No. 398,507.

T 0 all whom it may concern:

Be it known that we, Gnonen Wasnnvo- TON MURRAY, a citizen of the UnitedStates, residing at Sumter, county of Sumter, State of South Carolina,and (Jnxnnns V. RIoHEY, a citizen of the United States, residing at\Vashington, in the District of Columbia, have invented certain new anduseful Improvements in Portable Hoisting Devices and we do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to improvements in skids or portable hoistingdevices, and consists in the novel construction, combination andarrangement of parts hereinafter de scribed and claimed.

The object of the invention is to provide a simple, comparativelyinexpensive, durable, convenient and ellicient device of this char-vacter for use in stores, ware-houses and other places for loading andunloading transporting goods from place to place and for vari ous otherpurposes.

The above and other objects which will appear as the nature of myinvention is bet ter understood, are accomplished by means of theconstruction illustrated in the aceompanying drawings, in which:

Figure 1 is a perspective view of our improved portable hoisting deviceFig. 2 is an elevation of one side of the same, showing in full anddotted lines the two positions in which the pawl and hand lever may beused and Fig. 3 is a rear elevation of the device.

Referring to the drawings by numeral, 1 denotes our improved skid orportable hoist, which comprises a body 2 mounted upon two supportingwheels 3 and a supporting leg or foot 4. The body 2 which is horizontal,is of T-form, consisting of a longitudinal portion 5 and a cross portion6. The leg 4 depends from the rear end of the longitudinal portion 5 andas shown, is provided with a circular enlargement or base '7. Thesupporting wheels 3 are journaled upon the ends of depending portions 8which are provided at the ends of the cross portion or bar 6. At therear end of the frame on a level and in longitudinal alinement with theportion or bar 5 is provided a handle 9 of any suitable form andconstruction by means of which the foot or leg 4 may be elevated topermit the device to be readily moved from'place to place upon thesupporting wheels. The frame also comprises a crane arm 10 which, asshown, is of right angular form and proj ects vertically from therearend of the por tion or bar 5. The frame may be eonstructed of anysuitable material and the sizes or proportions of its parts may bevaried, as desired.

In order to hoist barrels, boxes, bags or loads of any description uponthe frame 2, we provide a hoisting cable or similar flexible element 11upon the frame 1.0. This cable 11 passes over suitable guides 12provided upon one side of the crane arm and here shown in the form ofgrooved pulleys. A hook, grapple or any other suitable load engagingdevice 13 is attached to one end of the cable 11 and its opposite end isattached to and wound upon a drum 14. The latter is here shown in theform of a wheel or disk having a deep groove in its periphery to receivethe cable 11 and also a broad friction surface 15 upon its periphery.Formed upon or secured to said drum is a ratchet wheel 16. The drum andthe ratchet wheel are mounted upon one side of the frame upon a pivotbolt or stub shaft 17 which passes through the lower end of the cranearm 10. Pivotally mounted upon the outer end of the bolt 17 is a handlever 18 which carries a double ended pawl or dog 19. The latter ispivoted at 20, upon the lever and has at one end a short tapered point21 adapted to engage the teeth of the ratchet wheel 16 when swung to thedotted line position shown in Fig. 2, and at its opposite end a curvedportion formed with a hook 22 which is adapted to engage the teeth ofthe ratchet wheel, as shown in full lines in Figs. 1 and 2. Retrogrademovement of the ratchet wheel and drum is prevented by a locking pawl 23which is pivoted at 24, upon the frame and adapted to engage the teethof the ratchet 16. To permit the load upon the hook 13 to be loweredgradually, we provide a friction brake lever 25 which is pivoted at 26,upon the arm 10 and has a cam face to engage the friction surface 15 ofthe drum.

The use and advantages of the invention will be readily understood fromthe foregoing description, taken in connection with the accompanyingdrawings. It will be seen that by means of this device barrels, boxes,bags and any other objects or articles may be quickly placed upon theframe 2 and transported from place to place, and raised or lowered topermit them to be loaded upon or unloaded from a wagon, truck, platformor the like. The construction is simple and durable, so that it may bemanufactured at a small cost and is not likely to become broken or toget out of order.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention.

If desired the crane arm 10 may have its top 27 adjustably mounted asshown in the drawings, or in any other suitable manner. As shown, thetop 27 is pivoted as at 28, and supported by means of a pawl 29. Thelatter is pivoted upon the arm 10 and has its end engaged with a rack 30provided upon the under side of the top 27. By mounting the top 27 inthis manner, it may be adjusted up or down to vary the range ofadjustment of the hoisting apparatus.

Having thus described our invention, what we claim as new and desire tosecure by Letters-Patent, is

V .A portable hoisting device of the class described having a T-bodycomposed of a cross piece 6 and a bar 5, supporting wheels at the endsof the cross piece, a mast having an opening through which one end ofthe bar 5 1s extended, said mast being secured to said bar and extendingbelow the same to form a supporting leg, and a hoisting drum andoperating mechanism therefor mounted on the mast.

In testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

GEO. W. MURRAY. CHARLES V. RIOHEY. Witnesses:

BENJ. G. OowL, L. O. HILTON.

